VAPKER 100 Pcs 10 value DIP Quartz Crystal Oscillator 4M,6M,8M,10M,12M,16M,20M,22.1184M,24M,25M Crystal Resonators Oscillator Assortment Kit

Excelente proveedor

The GOOD: They worked for my purpose.The BAD:1) Leads fairly short/thin for breadboard. --> Not problem with part just my application.2) Cracked plastic on box. ==> Meh... What I expected....3) Data Sheets Not Included or referenced: Not sure why they don't include a hyperlink or include it with the box???

They seem to work. I do not have a way to test them for how accurate they are, but as far as drop them in and they make the project word, they are great. Having the selection to work with is nice as it has allowed me to try arduinos at different speeds.

Great value.All the common frequencies

I have not had time or cause to test all of the crystals in the box. The ones I have fired up in circuits have worked well, and timing sequences in the circuits come out about where I expected them to. I have not tested them for accuracy beyond that minor test, so I cannot really give them 5 stars, since the only purpose of a crystal like these is to provide an accurate time base with a clean signal.For driving a PIC microcontroller, these are more than adequate, and could very well be incredibly accurate for far more demanding purposes, like radio reference signals or such. If you intend to use them in that setting, take some small comfort in knowing that if they are not up to the task, at least they didn't cost much. I, personally, would not hesitate to use them in that setting, and probably will.